Which of the following would be a testable hypothesis?

Dropping a ball from a height of 10m will cause it to bounce back up 5m.
Plants produce glucose as the end product of photosynthesis.
If certain foods are healthy for you, then they should also taste good.
If acid is added to a solution, then the Ph of the solution will go down.

1 answer

A testable hypothesis is one that can be supported or refuted through experimentation or observation.

  1. Dropping a ball from a height of 10m will cause it to bounce back up 5m. - This is testable; you can measure the height to which the ball bounces.

  2. Plants produce glucose as the end product of photosynthesis. - This is also testable; you can measure glucose production in plants under controlled conditions.

  3. If certain foods are healthy for you, then they should also taste good. - This is subjective and not easily testable in a scientific manner, as "healthy" and "taste good" can vary based on individual perceptions.

  4. If acid is added to a solution, then the pH of the solution will go down. - This is testable; you can measure the pH before and after adding acid.

Based on these assessments, the following hypotheses are clearly testable:

  • Dropping a ball from a height of 10m will cause it to bounce back up 5m.
  • Plants produce glucose as the end product of photosynthesis.
  • If acid is added to a solution, then the pH of the solution will go down.

So, the most definitive testable hypotheses in your list would be the first, second, and fourth options.